Overcurrent Protection, Phases - Siemens SIPROTEC 5 Technical Data Manual

11.8

Overcurrent Protection, Phases

Stage with Definite-Time Characteristic Curve
11.8.1
Setting Value for the Function Block Filter
h(0)
h(1)
h(2)
h(3)
h(4)
Setting Values for Protection Stage
Method of measurement
Threshold value
Dropout ratio
Operate delay
Dropout delay
Pickup delay
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout differential derived from the parameter Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for overcurrent and of 105 % for undercur-
rent functionality.
Minimum absolute dropout differential
Protection-class current transformer
Instrument current transformer
Times
Operate time with time delay = 0 ms
Extension of the operate time during operation with
transformer inrush-current detection
Dropout time
36 If you have selected the method of measurement = RMS value, do not set the threshold value under 0.1 l
37 OOT (Output Operating Time): additional delay of the output medium used, for example 5 ms with fast relays
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-A, Edition 05.2018
1 A @ 50 and 100 Irated
36
5 A @ 50 and 100 Irated
1 A @ 1.6 Irated
5 A @ 1.6 Irated
11.8 Overcurrent Protection, Phases
-100.000 to 100.000
-100.000 to 100.000
-100.000 to 100.000
-100.000 to 100.000
-100.000 to 100.000
Fundamental component
RMS value
0.030 A to 35.000 A
0.15 A to 175.00 A
0.001 A to 1.600 A
0.005 A to 8.000 A
0.90 to 0.99
0.00 s to 100.00 s
0.00 s to 60.00 s
0.00 s to 60.00 s
15 mA sec. (I = 1 A) or
rated
75 mA sec. (I = 5 A)
rated
0.5 mA sec. (I = 1 A) or
rated
2.5 mA sec. (I = 5 A)
rated
Approx. 25 ms + OOT 37 at 50 Hz
Approx. 22 ms + OOT at 60 Hz
Approx. 10 ms
Approx. 20 ms + OOT
Technical Data
Increments of 0.001
Increments of 0.001
Increments of 0.001
Increments of 0.001
Increments of 0.001
–
Increments of 0.001 A
Increments of 0.01 A
Increments of 0.001 A
Increments of 0.001 A
Increments of 0.01
Increments of 0.01 s
Increments of 0.01 s
Increments of 0.01 s
.
rated,sec
1121